Microsoft is back with another GP 2013 R2 big rock: Microsoft Dynamics GP 2013 R2 Feature of the Day: Requisitions This feature has needed an overhaul for a long time. It gets a complete rewrite with R2.
Microsoft Dynamics GP 2013 R2 Feature of the Day: Requisitions – Inside Microsoft Dynamics GP
Tips & Hidden FeaturesGP 2013
Archived post from 2014. Dynamics GP and the links it points to have changed since; check current documentation before relying on version-specific steps.